Hey Robert,
Thank you for reaching out to us! I’m very sorry about this issue you are experiencing.
When I click to edit my tickets running the latest version of Event Tickets Plus (4.5.3) and Woocommerce (3.1.2), everything works as expected (I can’t replicate the issue from here).
Can you please make sure that both plugins are up-to-date and let me know if the issue persists after that? I believe that there might be a plugin or theme conflict causing this issue you are experiencing: in that cause, it would be helpful to follow this tutorial to determine what is causing the issue.
I hope this helps! Let me know if you need anything else in the mean time and I’ll be happy to assist!
Regards,
Patricia